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(#M40165320) SELF QUESTION average Keep an EYE Keep an eye puzzle Keep an eye puzzle

the average age of a class of 39 students is 15 years.if the age teacher be included ,then the average increases by 3 months. Find the age of the teacher?

v.shaiaja (4 years ago)
Unsolved Read Solution (1)
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(#M40020907) SELF QUESTION Keep an EYE Keep an eye puzzle Keep an eye puzzle

Some consecutive natural numbers, starting with 1, are written on the board. Now, one of the numbers was erased and the average of the remaining numbers is 800/39. Find the number which was erased.

vikash singh (9 years ago)
Unsolved Read Solution (1)
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(#M40001409) SELF QUESTION Keep an EYE Keep an eye puzzle Keep an eye puzzle

Three companies working independently are saving 20%, 25% and 35% of their earnings. If these companies combine and work what would be the net percentage of savings?

Solution
Since earnings of the companies are not given so two cases arise
1) earnings are same
then (0.2x + 0.25x + 0.35x)/3x = (0.8/3)x
saving = 80/3 %
2) earnings are different
data are insufficient

Like manish sir answer on facebook.

suneil (12 years ago)
Solved
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(#M40001404) SELF QUESTION Keep an EYE Keep an eye puzzle Keep an eye puzzle

The average of squares of first 11 consecutive even numbers is:
(a)184 (b)148 (c)186 (d)174

suneil (12 years ago)
Solved Pargat Pal Singh Read Solution (2)
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(#M40001402) SELF QUESTION Keep an EYE Keep an eye puzzle Keep an eye puzzle

The average age of father and his two sons is 27 years. The difference in age between the two sons is 4 years and five years ago the average age of the two sons was 12 years. What is the present age of the father?
(a)34years(b)47years(c)64years(d)27years

suneil (12 years ago)
Solved Pargat Pal Singh Read Solution (2)
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